Some substances, like particles of this iron, contain only one kind of atom. Iron is an element. It is made of only one type of atom: iron atoms. Sulfur is another element. It contains only sulfur ...

Atoms can form strong bonds with each other, making molecules. Symbols and formulae Letters from the alphabet are used to represent chemical elements. An element’s chemical symbol is a single ...

Wow, it's amazing to think that everything you see around you is made up from a relatively small number of different types of substances called elements. Each element is comprised of particles called ...

An understanding of the differences between elements, compounds and mixtures form the basis for understanding chemical reactions ... In Image A, the circle is representing a particle of water (H 2 O – ...

Matter is made up of very small parts called atoms. Atoms can combine in different numbers and in different ways to make different molecules. Atoms and molecules make up all of the different ...

The amount of a substance that dissolves in a certain amount of water is a characteristic property of that substance. The different atoms and molecules of a substance give it its characteristic ...

We also, confusingly, tend to refer to pure substances made of one kind of atom, like chlorine gas, as elements. But these are very different from the isolated atoms depicted on the periodic table.